Piketty goes into some detail on that: https://www.vox.com/2014/4/8/5592198/the-short-guide-to-capital-in-the-21st-century https://www.vox.com/2014/4/8/5592198/

Piketty goes into some detail on that: https://www.vox.com/2014/4/8/5592198/the-short-guide-to-capital-in-the-21st-century https://www.vox.com/2014/4/8/5592198/the-short-guide-to-capi... The answer is that 1875-1920 looks an awful lot like 1975-2020.